| /* Copyright (C) 1994, 1997 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Library General Public License as |
| published by the Free Software Foundation; either version 2 of the |
| License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Library General Public License for more details. |
| |
| You should have received a copy of the GNU Library General Public |
| License along with the GNU C Library; see the file COPYING.LIB. If not, |
| write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #include <hurd.h> |
| #include <hurd/fd.h> |
| #include <hurd/signal.h> |
| #include <hurd/term.h> |
| #include <fcntl.h> |
| |
| /* Store PORT in file descriptor D, doing appropriate ctty magic. |
| FLAGS are as for `open'; only O_IGNORE_CTTY is meaningful. |
| D should be locked, and will not be unlocked. */ |
| |
| void |
| _hurd_port2fd (struct hurd_fd *d, io_t port, int flags) |
| { |
| io_t ctty; |
| mach_port_t cttyid; |
| int is_ctty = !(flags & O_IGNORE_CTTY) && ! __term_getctty (port, &cttyid); |
| |
| if (is_ctty) |
| { |
| /* This port is capable of being a controlling tty. |
| Is it ours? */ |
| struct hurd_port *const id = &_hurd_ports[INIT_PORT_CTTYID]; |
| __spin_lock (&id->lock); |
| if (id->port == MACH_PORT_NULL) |
| /* We have no controlling tty, so make this one it. */ |
| _hurd_port_locked_set (id, cttyid); |
| else |
| { |
| if (cttyid != id->port) |
| /* We have a controlling tty and this is not it. */ |
| is_ctty = 0; |
| /* Either we don't want CTTYID, or ID->port already is it. |
| So we don't need to change ID->port, and we can release |
| the reference to CTTYID. */ |
| __spin_unlock (&id->lock); |
| __mach_port_deallocate (__mach_task_self (), cttyid); |
| } |
| } |
| |
| if (!is_ctty || __term_open_ctty (port, _hurd_pid, _hurd_pgrp, &ctty) != 0) |
| /* XXX if IS_CTTY, then this port is our ctty, but we are |
| not doing ctty style i/o because term_become_ctty barfed. |
| What to do? */ |
| /* No ctty magic happening here. */ |
| ctty = MACH_PORT_NULL; |
| |
| /* Install PORT in the descriptor cell, leaving it locked. */ |
| { |
| mach_port_t old |
| = _hurd_userlink_clear (&d->port.users) ? d->port.port : MACH_PORT_NULL; |
| d->port.port = port; |
| if (old != MACH_PORT_NULL) |
| __mach_port_deallocate (__mach_task_self (), old); |
| } |
| |
| _hurd_port_set (&d->ctty, ctty); |
| } |